Steroids and sex hormones. Synthesis of 5- and 5- -17-oxo-19-hydroxy-3-aza-3, 19-cyclo-A-homo-androstane

The synthesis of the novel title compounds ( 2 and 3 ) is described. These two isomers differ from structure 1 , ascribed to the salamander alkaloid cycloneosamandione, with respect to ring A/B fusion and to the ketone position.     

Steroids and sexual hormones. 249. The transformation of dehydroabietic acid into 14 alpha-methylsteroids. I. The partial synthesis of 5-methoxy-17-oxo-14 alpha-methyl-delta(5,7,9,)-des-A-estratriene

A 18-step transformation of dehydroabietic acid ( 1 ) into ketone 40 , convenient starting material for the prparation of 14α-methylsteroids, is described.     

Steroids and sex hormones. The synthesis of 1-beta, 4-beta-oxido-3-aza-17-beta-hydroxy-A-homo-5-alpha-androstane

A sterically controlled transformation of 3-oxo-17β-acetoxy-Δ^1?-α-androstene ( 2 ) into 1β,4β-oxido-3-aza-17β-hydroxy-A-homo-5α-androstane ( 16 ) is described. With the exception of two conversions [ 14 → 15 (60%); 15 → 16 (50%)], the yields of the remaining seven steps are higher than 75% each. The reaction sequence will serve as a model for an analogous partial synthesis of samandarine ( 1 ).     

2-甲氧基-4-氧代-3-氧杂双环[3.1.0]己烷-6,6-二甲酸二乙酯的合成及结构表征

5-甲氧基-2(5H)-呋喃酮与溴代丙二酸二乙酯通过Michael加成、分子内亲核取代反应得到了环丙烷/丁内酯衍生物2-甲氧基-4-氧代-3-氧杂双环[3.1.0]己烷-6,6-二甲酸二乙酯,其结构通过1H NMR、13C NMR、X-射线单晶衍射进行了确认。     

Synthesis and Antimicrobial Activity of 2-[5-(R-Benzyl)-4-oxo-1,3-thiazolidin-2-ylidene]-3-oxobutanenitrile and [2-(1-Cyano-2-oxopropylidene)-4-oxo-1,3-thiazolidin-5-ylidene]acetic Acid Derivatives

Russian Journal of Organic Chemistry - The reactions of 2-cyano-3-oxobutanethioamide with ethyl 3-aryl-2-bromopropanoates and dialkyl acetylenedicarboxylates afforded a combinatorial library of new...     

Synthesis of bis[2-methoxy-4-(11-oxo-7,8,9,10,11,12-hexahydrobenzo[a]acridin-12-yl)phenyl] succinates

Reactions of succinyl chloride with 4-hydroxy-3-methoxybenzaldehyde and 3-ethoxy-4-hydroxybenzaldehyde gave the corresponding succinates which were brought into the condensation with naphthalen-2-amine to obtain Schiff bases. The latter reacted with CH acids (cyclohexane-1,3-dione and 5,5-dimethylcyclohexane-1,3-dione) to form bis[2-alkoxy-4-(11-oxo-7,8,9,10,11,12-hexahydrobenzo[a]acridin-12-yl)phenyl]-succinates which can also be obtained by three-component heterocyclization of naphthalen-2-amine with bis-(2-alkoxy-4-formylphenyl)succinates and CH acid.     

Monomeric cis-isothiocyanato complexes. Crystal and molecular structure of [Mn(mep)2(NCS)2] (mep=4-methoxy-2-(5-methoxy- 3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine)

The crystal and molecular structures of [Mn(mep)2- (NCS)2] ({ {mep}}=4-methoxy-2-(5-methoxy-3-methyl-1H-pyrazol-1-yl)-6-methylpyrimidine) have been determined by X-ray crystallography. The crystal structure of the title compound is built up of isolated [Mn(mep)2(NCS)2] molecules with the stereochemistry of a distorted octahedron for the MnN6 chromophore. The e.p.r. (Q-band) data are in agreement with the structural data.     

Steroids and sex hormones. 253. Synthetic experiments in the limonine series. II. Partial synthetic structure of ring A and A' of limonine

Two different synthetic approaches towards compound 16 with the ring A/A'-partial structure of limonin ( 1 ) are described.     

Crystal and molecular structure of 2-phenyl-2-thiono-5,6-(4′,5′-dimethylbenzo)-1,3,2-dithiaphosphepine and 2-methoxy-2-oxo-5,6-benzo-1,3,2-dioxaphosphepine

A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Branch, Academy of Sciences of the USSR. Translated from Zhurnal Strukturnoi Khimii, Vol. 31, No. 5, pp. 75–80, September–October, 1990.     

Poly (1,3-[2-methoxy-4-hydroxy-5-acetylphenylene] butylene) (HMAP-BG) as a polymeric ligand

Poly(1,3[2-methoxy-4-hydroxy-5-acetylphenylene]butylene) was prepared by Friedel-Craft polycondensation of 2-hydroxy, 4-methoxyacetophenone and 1,4-butane-diol in presence of poiyphosphoric acid catalyst. The polymer samples were characterized by IR spectra, TGA and their M_n determined by nonaqueous titration. Viscosity measurents in DMSO showed that solutions exhibited normal behaviour. Polymers were complexed with Cu(II), Ni(II), Mn(II), Co(II) and Zn(II) and characterized. Chelation and ion exchange properties were also studied by employing the batch equilibrium method.     

Synthesis and structure of 5-oxo-1-phenylpyrazoline-3- and 4-alkanoic acids. Antiinflammatory agents

Condensation of appropriate β-keto esters with phenylhydrazine gave 5-oxo-1-phenyl-2-pyrazoline-3-and 4-alkanoic esters 1 and 3 which were saponified to the corresponding alkanoic acids 2 and 4 . Analogous condensation of the same β-keto esters with hydrazobenzene gave 5-oxo-1,2-diphenyl-3-pyrazoline-3-and 4-alkanoic esters 5 and 7 which were similarly converted to acids 6 and 8 . The structures of the oxopyrazolines as revealed by their infrared absorption are discussed, and results of their antiinflammatory screening are reported.     

三苯基锡-2-(1, 2-亚乙二硫)亚甲基-3-羰基-5-芳基-4-戊烯酸 酯的合成及晶体 结构

由2-(1,2-亚乙二硫)亚甲基-3-羰基-5-芳基-4-戊烯酸与三苯基氢氧化锡反应,合成了九个标题化合物3。用X射线衍射法测定了3b的晶体结构。该晶体属三斜晶系,空间群P1,a=0.9074(2)nm,b=1.6809(3)nm,c=2.1834(4)nm,α=77.57(3)ⅲ,β=88.04(3)ⅲ,γ=89.47(3)ⅲ,V=3.2503nm^3,Z=2;R=0.0592。由锡氧原子间距离可推测,该晶体中羧酸根作为双齿配体与锡原子形成了分子内五配位结构。     

Complexes of 4-methoxy-2-(5-methoxy-3-methyl-pyrazol-1-yl)-6-methylpyrimidine,an anti-inflammatory agent—I. Copper(II) perchlorate complexes

The preparation and properties of copper(II) complexes of 4-methoxy-2-(4-methoxy-3-methyl-pyrazol-1-yl)-6-methylpyrimidine, are reported. Complexes of     

Crystal structure of copper(II) 2-methyl-3-{[3-methyl-5-oxo-1-phenylpyrazole-4-ylidene-methyl]amino}-quinazoline-4-onate

The crystal and molecular structure of a copper(II) complex based on 2-methyl-3-{[3-methyl-5-oxo-1-phenylpyrazole-4-ylidene-methyl]amino}-quinazoline-4-one is studied by single crystal X-ray diffraction. The chelate core is demonstrated to have a pyramidal structure.